Pokemon Go is most useful to them as a marketshare tool. They have no problem moving poke prodects but have completely saturated their target demographic already.
They had achieved a near cap on the pokemon brand's marketshare with young boys and so the Go app allows expansion into shadow demographics (girls, adults) that the brand was missing. Likewise the new interest has caused a spike in pokemon products (which nintendo owns across the board). I am seeing it first hand cause I own a bookstore. People are ordering old pokemon related shyt out of nowhere.
The company is using Go as a mass marketing tool and its resulting in sells of all sorts of poke products.
I got an order for this mag from 1999 from someone in Russia this week.

Nintendo knows what its doing.
I'm sitting on a vintage pokemon boardgame that I'm gonna try and flip for a few hundred.

Still in the wrapper.